Network & Email · page 22

Explains catch-all mailbox risks for validation and engagement.

Plans syntax, MX, and SMTP validation stages with retry rules.

Plans how to treat disposable domains at signup and send time.

Plans handling of info@ and admin@ style role addresses.

Tables common misspellings like gmial and gnail with corrections.

References 0.1 and 0.3 percent complaint thresholds with actions.

Steps to investigate a complaint spike from lists to content.

Lists reputation panels and check cadence for sending infrastructure.

Explains signing with two selectors during transitions.

Plans staged pct values while tightening the quarantine or reject policy.

Assigns mail streams to subdomains to isolate reputation.

Templates required footer fields like address and unsubscribe links.

Plans recognizable From name conventions per stream.

Plans monitored inboxes versus no-reply addresses per stream.

Plans pruning cadence for bounces, roles, and inactives.

Defines inactivity windows and segment cutoffs in a table.

Explains cross-list fingerprint detection and list bombing links.

Reviews subject lines and body patterns that trip filters.

References image-to-text ratio guidance and alt text practices.

Explains how shorteners affect filtering and tracking.

Checks redirect chains, mixed schemes, and cloaked links.

Plans multipart alternatives and plain-text fallback coverage.

Plans preheader text lengths and hidden preview snippets.

Explains Mail Privacy Protection effects on opens and clicks.